Method

Toast
the bread. meanwhile mix the watercress, carrot, lemon juice and olive
oil together. In a small bowl spread the houmous over each slice of
toast. Top 1 slice with the watercress and carrot salad, sandwich with
another slice of toast and top with the tomato. Lay the final slice of
bread, houmous side down, then press down and eat as is or cut the
sandwich into quarters.